class_docstr: This class is not only important to extend `tree.Class`, it is also a
  important for descriptors (if the descriptor methods are evaluated or not).
code: def py__call__(self, params):
      from jedi.evaluate.context import TreeInstance
  
      return ContextSet(
          TreeInstance(
              self.evaluator, self.parent_context, self, params
          )
      )
  
imports: from jedi._compatibility import use_metaclass
  from jedi.parser_utils import get_parent_scope
  from jedi.evaluate.cache import evaluator_method_cache, CachedMetaClass
  from jedi.evaluate import compiled
  from jedi.evaluate.lazy_context import LazyKnownContext
  from jedi.evaluate.filters import ParserTreeFilter, TreeNameDefinition, ContextName
  from jedi.evaluate.base_context import ContextSet, iterator_to_context_set, TreeContext
label_desc: Use image node_id 3 for calling the ClassContext obj's underlying member method code with example usage: obj.py__call__(params) and returns: ContextSet